Temperature-controlling apparatus for internal-combustion engines



F. M. FURBER APPARATUS FOR INTERNAL COMBUSTION ENGINES Filed May 27,1916 TEMPERATURE CONTROLLING I 0 9 .1 1 I 1 71, 1 r'z 1- z a a /E E {W 5'21 I '/I 1.1.2.: 1 ,5; g

UNITED STATES PATENT Patented Dec. 4, 1928.

OFFICE.

FREDERICK ML FURBER, OF REVERE, MASSACHUSETTS.

TEMPERATURE-CONTROLLING AYPARATUS FOR INTERNAL-COMBUSTION ENGINES.

Application filed May 27, 1916. Serial No. 100,411.

The invention relates to the automatic controlling of temperature ininternal combustion engines and has particular reference to much,however, as the limits within which it is desirable to maintain thetemperature are comparatively close to each other, it is difficult toobtain an effective thermal motor which will be operated by such slighttemperature changes.- I have therefore devised a construction in whichthe shutters or other mechanism are operated by motive power other thanthat derived from temperature variations, but which is neverthelesscontrolled thereby. 7

Any suitable motor may be employed in my improved constructiomand thismay be operated from any suitable source of power; but as specificallyshown I employ a pneumatic motor operated by the suction or vacuumderived from the inlet manifold of the engine. I In the drawings:

Figure 1 is a side elevation of an internal combustion engine andcooling system to which my improvement is applied;

Figure 2 is a front elevation thereof, partly in section; 1

Figure 3 is asection through the pneumatic motor; and

Figure 4 isa section through the thermal motor.

A is an internal combustion engine provided with an inlet manifold Bconnected to the carburetor C. D is a.- radiator which is connected tothe water-jacket of the engine by the'out-going and return conduits Eand F.

" e G is a series of shutters arranged to cover a portion or all of theradiating surface and to vary the quantity of air which is accessible tothe radiator. As shown, these shutters are formed by stationary andmovable register slides H and H, the former being attached to theradiator frame and the latter guided to be movable in relation thereto.

To actuate themovable re ister slide H, a pneumatic motor is provi ed,preferably comprising a cylinder I having-a piston J therein, which isconnected by a shank K to said movable slide. The cylinder I is securedin fixed position and has connected thereto a conduit L which leads tothe inlet manifold B of the engine. At one point in this conduit thereis'arranged a valve M which is controlled by ,a thermal motor under theinfluence of the heat from the engine. Preferably, the thermal motor issecured to the outlet conduit E of the water cooling system andcomprises a bar N inserted into the conduit E so as to transfer heatfrom said conduit to the thermostat member which carries the valve M.

With the construction described in operation, the movable shutter isheld normally in oneposition, either opened or closed, by a suitableyielding pressure, such as that of a spring 0 in the cylinder, I bearingagainst the piston J. When the engine is operating the suction producedin the intake manifold W111 be communicated to the. conduit L andthrough the latter to the cylinder I, if the valve M is opened. The fallin pressure in the cylinder will cause the atmospheric pressureoperating on the outer end of the piston to overcome the pressure of thespring and to shift the slide. Whenever the temperature of the waterpassing through the conduit E changes, this will cause a correspondingheating of the bar N and an expansion of the thermostatic membercarrying the valve M. which at, a predetermined. temperature will closethe valve M, cutting off connection between the cylinder I and thesuctionconduit and permitting the spring 0 to return the piston J.Assuming that the valve M is open at the low temperature limit and isclosed at the high temperature limit, themotor must be so arranged thatthe spring will open the shutters and the suction will close the same.Thus when the engine is cold, but in operation, the suction will becommunicated to the cylinder I and the piston operated to close theshutters, facilitating the heating of the motor and circulating wateruntil the desired temperature is obtained. Any further rise intemperature willcause the warping of the bar valve M, which will resultin gradually opening the shutters, to permit more air-to pass throughthe radiator and to effect gradual 4 cooling. It is obvious that intheconstruction described, a much more sensitive and more ac- N and thegradual closing of the where the work of shifting the shuttersmustcurate ope ting device is obtained than be rformed by a thermalmotor operating un er slilghttemperature changes. What claim as myinvention is 1. The combination of an internal combustion engine, acooling system therefor including a radiator, means for controlling theflow temperature.

2. The combination of an internal combustion engine, a cooling systemtherefor including a radiator, means for controlling the flow of airthrough the radiator, said means comprising a shutter device associatedwith the radiator, means directly responsive to suction produced in theengine cylinders for holding said shutter device closed until the enginereaches a predetermined temperature, an

means for moving such shutters to open osition, automatically, upon thesuction bemg shut ofl.

3. The combination of an internal combustion engine, a cooling systemtherefor including a radiator, means for controlling the flow 'of airthrough the radiator, said means comprising a shutter device associatedwith the radiator, and means automatically operating incident to theoperation of the engine'for holding said shutter device closed until theengine reaches a redetermined temperature and a thermostatic device forrendering sai last-mentioned means inoperative when the engine reaches apredetermined temperature.

In testimony whereof I aflix my signature.

FREDERICK M. FURBER.

